<template>
    <div class="app-container">
        <div class="filter-container">
            <el-input v-model="listQuery.title" placeholder="Title" style="width: 200px;" class="filter-item" @keyup.enter.native="handleFilter"></el-input>
            <el-select v-model="listQuery.importance" placeholder="Imp" clearable style="width: 90px" class="filter-item">
                <el-option v-for="item in importanceOptions" :key="item" :label="item" :value="item"></el-option>
            </el-select>
            <el-select v-model="listQuery.type" placeholder="Type" clearable class="filter-item" style="width: 130px">
                <el-option v-for="item in calendarTypeOptions" :key="item.key" :label="item.display_name+'('+item.key+')'" :value="item.key"></el-option>
            </el-select>
            <el-select v-model="listQuery.sort" style="width: 140px" class="filter-item" @change="handleFilter">
                <el-option v-for="item in sortOptions" :key="item.key" :label="item.label" :value="item.key"></el-option>
            </el-select>
            <el-button v-waves class="filter-item" type="primary" icon="el-icon-search" @click="handleFilter">
                Search
            </el-button>
            <el-button class="filter-item" style="margin-left: 10px;" type="primary" icon="el-icon-edit" @click="handleCreate">
                Add
            </el-button>
            <el-button v-waves :loading="downloadLoading" class="filter-item" type="primary" icon="el-icon-download" @click="handleDownload">
                Export
            </el-button>
            <el-checkbox v-model="showReviewer" class="filter-item" style="margin-left:15px;" @change="tableKey=tableKey+1">
                reviewer
            </el-checkbox>
        </div>

        <el-table :key="tableKey"
                  v-loading="listLoading"
                  :data="list"
                  border
                  fit
                  highlight-current-row
                  style="width: 100%;"
                  @sort-change="sortChange">
            <el-table-column label="ID" prop="id" sortable="custom" align="center" width="80" :class-name="getSortClass('id')">
                <template slot-scope="scope">
                    <span>{{ scope.row.id }}</span>
                </template>
            </el-table-column>
            <el-table-column label="Date" width="150px" align="center">
                <template slot-scope="scope">
                    <span>{{ scope.row.timestamp | parseTime('{y}-{m}-{d} {h}:{i}') }}</span>
                </template>
            </el-table-column>
            <el-table-column label="Title" min-width="150px">
                <template slot-scope="{row}">
                    <span class="link-type" @click="handleUpdate(row)">{{ row.title }}</span>
                    <el-tag>{{ row.type | typeFilter }}</el-tag>
                </template>
            </el-table-column>
            <el-table-column label="Author" width="110px" align="center">
                <template slot-scope="scope">
                    <span>{{ scope.row.author }}</span>
                </template>
            </el-table-column>
            <el-table-column v-if="showReviewer" label="Reviewer" width="110px" align="center">
                <template slot-scope="scope">
                    <span style="color:red;">{{ scope.row.reviewer }}</span>
                </template>
            </el-table-column>
            <el-table-column label="Imp" width="80px">
                <template slot-scope="scope">
                    <svg-icon v-for="n in +scope.row.importance" :key="n" icon-class="star" class="meta-item__icon"></svg-icon>
                </template>
            </el-table-column>
            <el-table-column label="Readings" align="center" width="95">
                <template slot-scope="{row}">
                    <span v-if="row.pageviews" class="link-type" @click="handleFetchPv(row.pageviews)">{{ row.pageviews }}</span>
                    <span v-else>0</span>
                </template>
            </el-table-column>
            <el-table-column label="Status" class-name="status-col" width="100">
                <template slot-scope="{row}">
                    <el-tag :type="row.status | statusFilter">
                        {{ row.status }}
                    </el-tag>
                </template>
            </el-table-column>
            <el-table-column label="Actions" align="center" width="230" class-name="small-padding fixed-width">
                <template slot-scope="{row}">
                    <el-button type="primary" size="mini" @click="handleUpdate(row)">
                        Edit
                    </el-button>
                    <el-button v-if="row.status!='published'" size="mini" type="success" @click="handleModifyStatus(row,'published')">
                        Publish
                    </el-button>
                    <el-button v-if="row.status!='draft'" size="mini" @click="handleModifyStatus(row,'draft')">
                        Draft
                    </el-button>
                    <el-button v-if="row.status!='deleted'" size="mini" type="danger" @click="handleModifyStatus(row,'deleted')">
                        Delete
                    </el-button>
                </template>
            </el-table-column>
        </el-table>

        <pagination v-show="total>0" :total="total" :page.sync="listQuery.page" :limit.sync="listQuery.limit" @pagination="getList"></pagination>

        <el-dialog :title="textMap[dialogStatus]" :visible.sync="dialogFormVisible">
            <el-form ref="dataForm" :rules="rules" :model="temp" label-position="left" label-width="70px" style="width: 400px; margin-left:50px;">
                <el-form-item label="Type" prop="type">
                    <el-select v-model="temp.type" class="filter-item" placeholder="Please select">
                        <el-option v-for="item in calendarTypeOptions" :key="item.key" :label="item.display_name" :value="item.key"></el-option>
                    </el-select>
                </el-form-item>
                <el-form-item label="Date" prop="timestamp">
                    <el-date-picker v-model="temp.timestamp" type="datetime" placeholder="Please pick a date"></el-date-picker>
                </el-form-item>
                <el-form-item label="Title" prop="title">
                    <el-input v-model="temp.title" ></el-input>
                </el-form-item>
                <el-form-item label="Status">
                    <el-select v-model="temp.status" class="filter-item" placeholder="Please select">
                        <el-option v-for="item in statusOptions" :key="item" :label="item" :value="item"></el-option>
                    </el-select>
                </el-form-item>
                <el-form-item label="Imp">
                    <el-rate v-model="temp.importance" :colors="['#99A9BF', '#F7BA2A', '#FF9900']" :max="3" style="margin-top:8px;"></el-rate>
                </el-form-item>
                <el-form-item label="Remark">
                    <el-input v-model="temp.remark" :autosize="{ minRows: 2, maxRows: 4}" type="textarea" placeholder="Please input"></el-input>
                </el-form-item>
            </el-form>
            <div slot="footer" class="dialog-footer">
                <el-button @click="dialogFormVisible = false">
                    Cancel
                </el-button>
                <el-button type="primary" @click="dialogStatus==='create'?createData():updateData()">
                    Confirm
                </el-button>
            </div>
        </el-dialog>

        <el-dialog :visible.sync="dialogPvVisible" title="Reading statistics">
            <el-table :data="pvData" border fit highlight-current-row style="width: 100%">
                <el-table-column prop="key" label="Channel"></el-table-column>
                <el-table-column prop="pv" label="Pv"></el-table-column>
            </el-table>
            <span slot="footer" class="dialog-footer">
                <el-button type="primary" @click="dialogPvVisible = false">Confirm</el-button>
            </span>
        </el-dialog>
    </div>
</template>

<script>
    const l = httpVueLoader;
    const Pagination = l('/vue/components/Pagination/index.vue');
    import waves from "/vue/directive/waves/index.js";
    import { parseTime } from "/vue/utils/index.js";
    import { fetchList, fetchPv, createArticle, updateArticle } from '/vue/api/article.js';
    import { export_json_to_excel } from "/vue/vendor/Export2Excel.js";
    const calendarTypeOptions = [
        { key: 'CN', display_name: 'China' },
        { key: 'US', display_name: 'USA' },
        { key: 'JP', display_name: 'Japan' },
        { key: 'EU', display_name: 'Eurozone' }
    ]

    // arr to obj, such as { CN : "China", US : "USA" }
    const calendarTypeKeyValue = calendarTypeOptions.reduce((acc, cur) => {
        acc[cur.key] = cur.display_name
        return acc
    }, {})

    module.exports = {
        name: 'ComplexTable',
        components: { "Pagination": Pagination },
        directives: { waves },
        filters: {
            statusFilter(status) {
                const statusMap = {
                    published: 'success',
                    draft: 'info',
                    deleted: 'danger'
                }
                return statusMap[status]
            },
            typeFilter(type) {
                return calendarTypeKeyValue[type]
            }
        },
        data() {
            return {
                tableKey: 0,
                list: null,
                total: 0,
                listLoading: true,
                listQuery: {
                    page: 1,
                    limit: 20,
                    importance: undefined,
                    title: undefined,
                    type: undefined,
                    sort: '+id'
                },
                importanceOptions: [1, 2, 3],
                calendarTypeOptions,
                sortOptions: [{ label: 'ID Ascending', key: '+id' }, { label: 'ID Descending', key: '-id' }],
                statusOptions: ['published', 'draft', 'deleted'],
                showReviewer: false,
                temp: {
                    id: undefined,
                    importance: 1,
                    remark: '',
                    timestamp: new Date(),
                    title: '',
                    type: '',
                    status: 'published'
                },
                dialogFormVisible: false,
                dialogStatus: '',
                textMap: {
                    update: 'Edit',
                    create: 'Create'
                },
                dialogPvVisible: false,
                pvData: [],
                rules: {
                    type: [{ required: true, message: 'type is required', trigger: 'change' }],
                    timestamp: [{ type: 'date', required: true, message: 'timestamp is required', trigger: 'change' }],
                    title: [{ required: true, message: 'title is required', trigger: 'blur' }]
                },
                downloadLoading: false
            }
        },
        created() {
              this.getList();  
        },
        methods: {
            getList() {
                this.listLoading = true
                fetchList(this.listQuery).then(response => {
                    this.list = response.data.items
                    this.total = response.data.total

                    // Just to simulate the time of the request
                    setTimeout(() => {
                        this.listLoading = false
                    }, 1.5 * 1000)
                })
            },
            handleFilter() {
                this.listQuery.page = 1
                this.getList()
            },
            handleModifyStatus(row, status) {
                this.$message({
                    message: '操作Success',
                    type: 'success'
                })
                row.status = status
            },
            sortChange(data) {
                const { prop, order } = data
                if (prop === 'id') {
                    this.sortByID(order)
                }
            },
            sortByID(order) {
                if (order === 'ascending') {
                    this.listQuery.sort = '+id'
                } else {
                    this.listQuery.sort = '-id'
                }
                this.handleFilter()
            },
            resetTemp() {
                this.temp = {
                    id: undefined,
                    importance: 1,
                    remark: '',
                    timestamp: new Date(),
                    title: '',
                    status: 'published',
                    type: ''
                }
            },
            handleCreate() {
                this.resetTemp()
                this.dialogStatus = 'create'
                this.dialogFormVisible = true
                this.$nextTick(() => {
                    this.$refs['dataForm'].clearValidate()
                })
            },
            createData() {
                this.$refs['dataForm'].validate((valid) => {
                    if (valid) {
                        this.temp.id = parseInt(Math.random() * 100) + 1024 // mock a id
                        this.temp.author = 'vue-element-admin'
                        createArticle(this.temp).then(() => {
                            this.list.unshift(this.temp)
                            this.dialogFormVisible = false
                            this.$notify({
                                title: 'Success',
                                message: 'Created Successfully',
                                type: 'success',
                                duration: 2000
                            })
                        })
                    }
                })
            },
            handleUpdate(row) {
                this.temp = Object.assign({}, row) // copy obj
                this.temp.timestamp = new Date(this.temp.timestamp)
                this.dialogStatus = 'update'
                this.dialogFormVisible = true
                this.$nextTick(() => {
                    this.$refs['dataForm'].clearValidate()
                })
            },
            updateData() {
                this.$refs['dataForm'].validate((valid) => {
                    if (valid) {
                        const tempData = Object.assign({}, this.temp)
                        tempData.timestamp = +new Date(tempData.timestamp) // change Thu Nov 30 2017 16:41:05 GMT+0800 (CST) to 1512031311464
                        updateArticle(tempData).then(() => {
                            for (const v of this.list) {
                                if (v.id === this.temp.id) {
                                    const index = this.list.indexOf(v)
                                    this.list.splice(index, 1, this.temp)
                                    break
                                }
                            }
                            this.dialogFormVisible = false
                            this.$notify({
                                title: 'Success',
                                message: 'Update Successfully',
                                type: 'success',
                                duration: 2000
                            })
                        })
                    }
                })
            },
            handleDelete(row) {
                this.$notify({
                    title: 'Success',
                    message: 'Delete Successfully',
                    type: 'success',
                    duration: 2000
                })
                const index = this.list.indexOf(row)
                this.list.splice(index, 1)
            },
            handleFetchPv(pv) {  
                fetchPv(pv).then(response => {
                    this.pvData = response.data.pvData
                    this.dialogPvVisible = true
                })
            },
            handleDownload() {
                this.downloadLoading = true
                  const tHeader = ['timestamp', 'title', 'type', 'importance', 'status']
                  const filterVal = ['timestamp', 'title', 'type', 'importance', 'status']
                  const data = this.formatJson(filterVal, this.list)
                  export_json_to_excel({
                        header: tHeader,
                        data,
                        filename: 'table-list'
                  })
                  this.downloadLoading = false
            },
            formatJson(filterVal, jsonData) {
                return jsonData.map(v => filterVal.map(j => {
                    if (j === 'timestamp') {
                        return parseTime(v[j])
                    } else {
                        return v[j]
                    }
                }))
            },
            getSortClass: function (key) {
                const sort = this.listQuery.sort
                return sort === `+${key}`
                    ? 'ascending'
                    : sort === `-${key}`
                        ? 'descending'
                        : ''
            }
        }
    }
</script>
